anybody knows if a PR4 ECU is compatible with a DOHC ZC ?
i did my research but found that the ECUS that go with DOHC ZCs are
PM7
PG7
PM6

and that PR4 ecus are from either a 1990-1993 Integra LS/GS(DA) with OBD0
and in some cases PR4s came OBD2 with LS/GS/RS (B18B) all being 1.8 motors in my head it doesnt make sense that the PR4 works with a ZC

but if anyone that has or had DOHC ZC can answer this question for me i'd really appreciate it

 

i have a Dohc Zc motor in my 91 hatch si and my pm6 computer that came with the car runs my zc motor just fine ive never had a problem out of it.

 

i did a swap for one my buddys an he bout a pr4 an it runs great.

 

the OBD0 PR4 ECU will run the DOHC ZC, just not as well as the PM7 or PG7 - PM6 will also not run as well as the PM7 or PG7 due to having lower rpm fuel cut-off - both PR4 and PM6 have fuel cut-off at about 400 rpm lower than the PM7 and PG7

 

any obd0 non vtec will work. but honda made specific ecu's for a reason

 

isnt the PR4 1.8 for LS and GS integras?

i bought a crx with a poorly done DOHC ZC swap and its not running well seems like timing isnt right and when i was removing the carpet there was a loose PR4 thats why i asked because this might be the problem but im going to try and find a PM6 or a PG7 because unfortunately the pm7 is hard to find unless you buy a jdm swap

anybody else with bad PR4 experiences? let me know..

 

yes - 90-91 with B18A1 engine

 

i ran a pm7 on my old zc dohc setup and it ran perfecto...!!!

 

obviously LOL

I ran a PR4 on my DOHC ZC for a time, it ran slightly different (sluggish). Only slightly noticeable, but it ran.

 

exactly so they are not ecus for a 1.6 DOHC...
im going to upload a video of the engine so you guys can see and let me know what yall think..

 

I'm not sure of the ecu numbers but i had a 89 integra us ecu runing my zc and it ran like a champ!

 

89 integra ecu is pg7...!!!

 

yeah i know but a 89 very hard to find
if anybody got a PM7 PM6 or PG7 ECU let me know..

heres a little vid of the engine..

kinda gay but if anybodys ever had trouble or might know what can be causing this feel free to post thanks

 

you guys might want to skip to 2:10...

 

the pm7 pretty good but it cuts off at 115

 

i have a zdyne pm6 its amazing very pricey but my redline is set at 8300 wich is way beyond a zc redline so have to be carful lol i just spun my bearings i changing my motors out tomarow do u have cams in it or is that just the rough idle i hear nice headers i didnt know greddy made headers for zc's back in the day

 

bump before going to sleep

take a look at the vid!